| San Marino to Decatur (Alabama) | 1,768.59 mi (2,846.27 km) |
| San Marino to Decatur (Georgia) | 1,929.45 mi (3,105.15 km) |
| San Marino to Decatur (Illinois) | 1,650.36 mi (2,656.00 km) |
| San Marino to Deer Park (New York) | 2,472.27 mi (3,978.73 km) |
| San Marino to Deer Park (Texas) | 1,380.06 mi (2,221.00 km) |
| San Marino to Deerfield (Illinois) | 1,725.07 mi (2,776.22 km) |
| San Marino to Deerfield Beach (Florida) | 2,317.38 mi (3,729.46 km) |
| San Marino to Defiance (Ohio) | 1,896.94 mi (3,052.82 km) |
| San Marino to DeForest (Wisconsin) | 1,664.16 mi (2,678.21 km) |
| San Marino to DeKalb (Illinois) | 1,677.12 mi (2,699.06 km) |
| San Marino to Del Aire (California) | 20.42 mi (32.87 km) |
| San Marino to Del City (Oklahoma) | 1,174.50 mi (1,890.18 km) |
| San Marino to Del Rio (Texas) | 1,062.83 mi (1,710.46 km) |
| San Marino to DeLand (Florida) | 2,184.32 mi (3,515.32 km) |
| San Marino to Delano (California) | 130.93 mi (210.71 km) |
